Subject:
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Re: Connect BT devices to the NXT without a passkey?
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Sun, 7 Jan 2007 02:14:28 GMT
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Viewed:
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12315 times
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In article <025201c73045$8574a7c0$0e0ba8c0@dickdesktop>, Dick Swan <dickswan@sbcglobal.net>
writes
>
> LEGO released the open source firmware for the ARM CPU. They did not
> release the firmware source for the BT module
This is true.
> which is proprietary code
> developed by the BT module/hardware manufacturer (CSR)
The pre-approved Bluetooth low level stack is proprietary to CSR. The
code that runs in CSR's Virtual Machine to implement the serial port
profile and talk to the ARM mpu probably belongs to Lego and/or NI.
> CSR's BT module is a "Bluecore V2.0" version. The support for SPP
> (Serial Port Profile) is within this module and likely this is the
> best/only location for implementation of a HID (Human Interface Device)
> profile stack.
>
> If above is accurate, it seems very unlikely that NXT will be able to
> support the WII modules without an upgrade to the Bluecore firmware.
It is not clear exactly how the Bluetooth stack behaves. I was hoping
to be able to create L2CAP connections. I don't plan to make new
firmware, the tool for this is CSR's BlueLab which Google suggests sells
for US$3000 plus taxes.
At least two Bluetooth keyboards support the Serial Port Profile as well
as the HID one:
http://bluetooth.com/Bluetooth/Connect/Products/Product_Details.htm?ProductID=1703
http://www.chainpus.com/products/keyboard/bk300.html
Maybe other devices do too?
Regards,
Tony
--
The NXT Step blog discusses the Lego Mindstorms NXT:
http://thenxtstep.blogspot.com/
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